It's too early to say whether the display will be commercialized, said a spokeswoman for SEL, an R&D company based outside Tokyo.

Seen as the successor 4K, 8K screens generally have a resolution of about 8,000 pixels on the horizontal axis, with the total number of pixels on the screen being four times that of 4K and 16 times that of full-HD.

Japanese public broadcaster Nippon Hoso Kyokai (NHK) TV has been experimenting with the format, which it calls Super Hi-Vision, for years. It plans to hold public viewings in Japan of 2014 World Cup soccer matches in 8K beginning on Sunday.

Organic light-emitting diode (OLED) displays, which can deliver colors that are more vivid than standard LCD displays, have been the focus of debate on when they may enter the consumer mainstream.